I bet most casual viewers flipping through their guide have no clue what "RT" stands for.
It seems that they make no effort to reveal it.
Well, they don't exactly hide it as their user name is actually RussiaToday...
http://www.youtube.com/user/RussiaTodayRT is a global news channel broadcasting from Moscow and Washington studios. With a global reach of over 530 million people, or 25% of all cable subscribers worldwide, RT news covers the major issues of our time for viewers wishing to question more. Our team of young news professionals has made RT the first news channel to break the 500 million YouTube views benchmark.